Lantronix Secure Com Port Redirector

SCPR is a Windows application which creates a secure communications path over a network between the computer and electronic serial-based devices that are traditionally controlled via a COM Port. With the proliferation of information in today’s electronic world, businesses are more concerned than ever about protecting data from unwanted intrusion as it is transferred over a network or the Internet. Lantronix has addressed this critical requirement with Secure Com Port Redirector (SCPR).

This unique and easy-to-manage product extends the functionality of COM port-based Windows applications. Using standard TCP/IP protocols and advanced encryption algorithms, SCPR maps ‘virtual COM Ports’ to Lantronix device servers and encrypts the data at both ends of the communication. This enables COM-based software applications to communicate securely over a network or the Internet to remote serial devices. Those devices can then be managed from virtually anywhere without the threat of compromising data security. Sensitive information can be transmitted to and from remote equipment over the network or the Internet with the confidence of the highest level of security. Additionally this enhanced communication from centralized applications to remote devices, without the need to modify the application or device, breathes new life into legacy equipment.

To take advantage of SCPR, device servers must support the Rijndael AES encryption. Currently, Lantronix’s SecureBox family of external device servers and versions of XPort, WiBox and Micro125 embedded solutions support this advanced Rijndael AES.

SCPR can also be used to create secure COM Port-based connections between PCs over Ethernet. With SCPR installed at each machine, PCs that were formerly ‘hard-wired’ by serial cabling for security purposes or to accommodate applications that only understood serial data can instead communicate over an Ethernet network or the Internet.


  • SCPR v4.3.x.1 must be installed as a clean install, not an upgrade from previous versions of the SCPR.
  • Uninstall any previous versions of the SCPR in Windows Add/Remove Programs before installing version
  • To preserve existing virtual COM ports, across installations, save the COM ports to a COM Port Configuration (.cpc) file from SCPR before uninstalling the application.
  • At the top of the SCPR configuration window, choose Export to Com Port Config file from the Com Port menu and save a .cpc file to a location where you can find it, e.g. on your desktop.
  • The resulting .cpc file can be loaded onto the new installation of the SCPR by choosing Import from Com Port Config file from the Com Port menu and navigate to the file.
  • A version that will allow a clean upgrade without requiring uninstallation of previously installed versions will be available in a future release.


  • x64 (64bit): Windows Vista, 7, 8, 10, 11 and Server 2008, 2016, 2019 and 2022
  • Microsoft .NET Framework v4.0. For CprManager.exe and CprMonitor.exe only.
  • 30MB free hard drive space.
  • Device Servers must have firmware version or greater to use RFC2217 (TruPort) capability.

The „Internet Connection Firewall“ must be disabled, or else UDP Ports 30718, 43282, and 43283 must be available. Otherwise, you will not be able to detect or communicate with any devices on the network. For most current Lantronix device servers, only port 30718 must be added as an Exception. If you are using the SCPR with legacy device servers such as the MSSs, add exceptions for 43282 and 43283. If the connection is between two different sites you may also need to allow these ports access through the corporate firewall.


File size: 0,3MB



File size 0,5MB


Secure Com Port Redirector

Software installator.

File size: 4MB


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